<HTML>
<BODY BGCOLOR="white">
<PRE>
<FONT color="green">001</FONT>    package org.hackystat.telemetry.analyzer.reducer.util;<a name="line.1"></a>
<FONT color="green">002</FONT>    <a name="line.2"></a>
<FONT color="green">003</FONT>    import org.hackystat.telemetry.analyzer.reducer.TelemetryReducerException;<a name="line.3"></a>
<FONT color="green">004</FONT>    <a name="line.4"></a>
<FONT color="green">005</FONT>    /**<a name="line.5"></a>
<FONT color="green">006</FONT>     * Provides utility functions for handling reducer options.<a name="line.6"></a>
<FONT color="green">007</FONT>     * <a name="line.7"></a>
<FONT color="green">008</FONT>     * @author (Cedric) Qin Zhang<a name="line.8"></a>
<FONT color="green">009</FONT>     */<a name="line.9"></a>
<FONT color="green">010</FONT>    public class ReducerOptionUtility {<a name="line.10"></a>
<FONT color="green">011</FONT>    <a name="line.11"></a>
<FONT color="green">012</FONT>      /**<a name="line.12"></a>
<FONT color="green">013</FONT>       * Parses boolean reduction option.<a name="line.13"></a>
<FONT color="green">014</FONT>       * <a name="line.14"></a>
<FONT color="green">015</FONT>       * @param optionIndex The 0-based option position.<a name="line.15"></a>
<FONT color="green">016</FONT>       * @param optionString The option string to be parsed.<a name="line.16"></a>
<FONT color="green">017</FONT>       * @return True or false.<a name="line.17"></a>
<FONT color="green">018</FONT>       * @throws TelemetryReducerException If the option string does not represent a boolean value.<a name="line.18"></a>
<FONT color="green">019</FONT>       */<a name="line.19"></a>
<FONT color="green">020</FONT>      public static boolean parseBooleanOption(int optionIndex, String optionString) <a name="line.20"></a>
<FONT color="green">021</FONT>          throws TelemetryReducerException {<a name="line.21"></a>
<FONT color="green">022</FONT>        if ("true".equalsIgnoreCase(optionString) || "yes".equalsIgnoreCase(optionString)) {<a name="line.22"></a>
<FONT color="green">023</FONT>          return true; <a name="line.23"></a>
<FONT color="green">024</FONT>        }<a name="line.24"></a>
<FONT color="green">025</FONT>        else if ("false".equalsIgnoreCase(optionString) || "no".equalsIgnoreCase(optionString)) {<a name="line.25"></a>
<FONT color="green">026</FONT>          return false;<a name="line.26"></a>
<FONT color="green">027</FONT>        }<a name="line.27"></a>
<FONT color="green">028</FONT>        else {<a name="line.28"></a>
<FONT color="green">029</FONT>          throw new TelemetryReducerException("Parameter " + (optionIndex + 1) <a name="line.29"></a>
<FONT color="green">030</FONT>                                       + " must indicate a boolean value.");<a name="line.30"></a>
<FONT color="green">031</FONT>        }<a name="line.31"></a>
<FONT color="green">032</FONT>      }<a name="line.32"></a>
<FONT color="green">033</FONT>      <a name="line.33"></a>
<FONT color="green">034</FONT>      /**<a name="line.34"></a>
<FONT color="green">035</FONT>       * Parses mode option.<a name="line.35"></a>
<FONT color="green">036</FONT>       * <a name="line.36"></a>
<FONT color="green">037</FONT>       * @param optionIndex The 0-based option position.<a name="line.37"></a>
<FONT color="green">038</FONT>       * @param modes An array of acceptable strings.<a name="line.38"></a>
<FONT color="green">039</FONT>       * @param modeString The option string to be parsed.<a name="line.39"></a>
<FONT color="green">040</FONT>       * @return The index into modes where modes[index] == modeString (case insensitive).<a name="line.40"></a>
<FONT color="green">041</FONT>       * @throws TelemetryReducerException If no match can be found.<a name="line.41"></a>
<FONT color="green">042</FONT>       */<a name="line.42"></a>
<FONT color="green">043</FONT>      public static int parseModeOption(int optionIndex, String[] modes, String modeString) <a name="line.43"></a>
<FONT color="green">044</FONT>          throws TelemetryReducerException {<a name="line.44"></a>
<FONT color="green">045</FONT>        for (int i = 0; i &lt; modes.length; i++) {<a name="line.45"></a>
<FONT color="green">046</FONT>          if (modes[i].equalsIgnoreCase(modeString)) {<a name="line.46"></a>
<FONT color="green">047</FONT>            return i;<a name="line.47"></a>
<FONT color="green">048</FONT>          }<a name="line.48"></a>
<FONT color="green">049</FONT>        }<a name="line.49"></a>
<FONT color="green">050</FONT>        //none matching<a name="line.50"></a>
<FONT color="green">051</FONT>        StringBuffer buffer = new StringBuffer(32);<a name="line.51"></a>
<FONT color="green">052</FONT>        buffer.append("Parameter ").append(optionIndex + 1).append(" must be one of "); //NOPMD<a name="line.52"></a>
<FONT color="green">053</FONT>        for (int i = 0; i &lt; modes.length; i++) {<a name="line.53"></a>
<FONT color="green">054</FONT>          buffer.append("'").append(modes[i]).append("'"); //NOPMD<a name="line.54"></a>
<FONT color="green">055</FONT>          buffer.append(i == modes.length - 1 ? "." : ", ");<a name="line.55"></a>
<FONT color="green">056</FONT>        }<a name="line.56"></a>
<FONT color="green">057</FONT>        throw new TelemetryReducerException(buffer.toString());<a name="line.57"></a>
<FONT color="green">058</FONT>      }<a name="line.58"></a>
<FONT color="green">059</FONT>    }<a name="line.59"></a>




























































</PRE>
</BODY>
</HTML>
